Added TTransformedValues to FormProvider

[yasamoka]

First of all, thank you so much for this wonderful library!

I am not sure if this pull request is suitable for the problem I was facing, and I may be missing something here, so I hope you can guide me further on this if needed.

The fix proposed relates to pull request #9735.

Say we have this example, inspired by the one you gave in the aforementioned pull request.

import { Form, FormProvider, useForm } from "react-hook-form";

const defaultValues = { test: "test" };

type FormValues = typeof defaultValues;
type TransformedFormValue = {
  test: number;
};

const Test = () => {
  const methods = useForm<FormValues, unknown, TransformedFormValue>({
    defaultValues: { test: "test" }
  });
  const { control } = methods;

  return (
    <FormProvider {...methods}>
      <Form<FormValues, TransformedFormValue>
        onSubmit={(data) => {
          console.log(data); // data.test -> number
        }}
        control={control} // optional if not using context
      >
        <input />
      </Form>
    </FormProvider>
  );
};

https://codesandbox.io/s/naughty-worker-35iqq0?file=/src/App.tsx

FormProvider would give a type error since it expects props of type UseFormReturn<FormValues, any, undefined> while formMethods is of type UseFormReturn<FormValues, any, TransformedValue>.

Thank you again!

[codesandbox]

  Open in CodeSandbox Web Editor | VS Code | VS Code Insiders

[bluebill1049]

Thanks for the PR. Could you run this script: https://github.com/react-hook-form/react-hook-form/blob/master/package.json#L47 thanks

[yasamoka]

For sure!

>>> pnpm api-extractor

> react-hook-form@7.44.0-rc.2 api-extractor .../react-hook-form
> api-extractor run --local


api-extractor 7.33.7  - https://api-extractor.com/

Using configuration from ./api-extractor.json
Analysis will use the bundled TypeScript version 4.8.4
*** The target project appears to use TypeScript 5.0.2 which is newer than the bundled compiler engine; consider upgrading API Extractor.
Warning: You have changed the public API signature for this project. Updating reports/api-extractor.md

API Extractor completed successfully

[yasamoka]

Thanks!